高流量吸氧对冠状动脉成像质量的影响

摘要

Purpose To compare the difference of CT coronary artery imaging quality under highflow oxygen uptake and normal breathing, and to investigate the effect of high flow oxygen uptake on the quality of CT coronary artery imaging.Materials and Methods 132 patients underwent coronary CTA examination using 256-slice CT (Philips), among them 71 patients were supplied with highflow oxygen, and the other 61 were asked to breathe normally. Coronary arteries were post-processed and reconstructed on AW 4.4 workstation. Scanning completion rate, signal to noise ratio (SNR), contrast to noise ratios(CNR) and image quality score ofcoronary segment using these two prospective ECG-gating techniques were compared.Results The scanning completion rate and image quality score of the highflow oxygen uptake group were significantly superior to those of the normal breathing group (P<0.05). However, there was no statistically significant difference of SNR and CNR between the two groups (P>0.05).Conclusion Imaging quality of coronary CTA can be improved using highflow oxygen uptake with reduced patient radiation dose, thus worth being used clinically as a simple and practicable method.%目的比较高流量吸氧与正常呼吸状态下CT冠状动脉成像质量的差异，探讨高流量吸氧对CT冠状动脉成像质量的影响。资料与方法132例患者采用Philips 256 CT行CT冠状动脉成像，其中71例给予高流量吸氧，61例正常呼吸。采用AW 4.4工作站行后处理冠状动脉血管重建。比较两组前瞻性心电门控完成扫描比例及图像的信噪比、对比噪声比和冠状动脉各节段图像质量评分。结果给予高流量吸氧患者的前瞻性心电门控完成扫描比例及图像质量评分明显高于正常呼吸者（P<0.05），但两组图像信噪比及对比噪声比差异无统计学意义（P>0.05）。结论高流量吸氧可以在降低患者受辐射剂量的同时提高CT冠状动脉成像的质量，该方法简单易行，值得临床推广使用。